:root {
  --background: 42 40% 96%;
  --foreground: 222 38% 13%;
  --primary: 268 78% 52%;
  --primary-foreground: 0 0% 100%;
  --secondary: 176 62% 43%;
  --secondary-foreground: 0 0% 100%;
  --muted: 36 23% 88%;
  --muted-foreground: 221 15% 39%;
  --destructive: 352 78% 52%;
  --destructive-foreground: 0 0% 100%;
  --border: 35 22% 80%;
  --card: 0 0% 100%;
  --card-foreground: 222 38% 13%;
  --shadow-sm: 0 2px 10px hsl(222 38% 13% / 0.08);
  --shadow-md: 0 14px 35px hsl(222 38% 13% / 0.13);
  --shadow-lg: 0 24px 70px hsl(268 78% 35% / 0.23);
  --transition-fast: 150ms ease;
  --transition-smooth: 280ms cubic-bezier(.2,.8,.2,1);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
}

.dark {
  --background: 228 33% 9%;
  --foreground: 43 45% 94%;
  --primary: 272 88% 68%;
  --primary-foreground: 228 33% 9%;
  --secondary: 177 70% 48%;
  --secondary-foreground: 228 33% 9%;
  --muted: 229 22% 17%;
  --muted-foreground: 40 14% 72%;
  --destructive: 352 88% 64%;
  --destructive-foreground: 228 33% 9%;
  --border: 230 20% 24%;
  --card: 228 28% 13%;
  --card-foreground: 43 45% 94%;
  --shadow-sm: 0 2px 12px hsl(0 0% 0% / 0.25);
  --shadow-md: 0 16px 42px hsl(0 0% 0% / 0.35);
  --shadow-lg: 0 28px 80px hsl(272 88% 30% / 0.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, hsl(var(--primary) / 0.18), transparent 34rem),
    radial-gradient(circle at 85% 20%, hsl(var(--secondary) / 0.16), transparent 28rem),
    hsl(var(--background));
  color: hsl(var(--foreground));
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
button, input, select { font: inherit; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible {
  outline: 3px solid hsl(var(--primary) / 0.38);
  outline-offset: 3px;
}
.brush-card {
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-fast);
}
.brush-card:hover { transform: translateY(-3px); }
.pulse-ring { animation: pulseRing 1.1s ease-in-out infinite; }
@keyframes pulseRing {
  0%, 100% { box-shadow: 0 0 0 0 hsl(var(--primary) / 0.38); }
  50% { box-shadow: 0 0 0 12px hsl(var(--primary) / 0); }
}
.sequence-pop { animation: sequencePop 360ms cubic-bezier(.2,.8,.2,1); }
@keyframes sequencePop {
  0% { transform: scale(.85) rotate(-2deg); opacity: .35; }
  100% { transform: scale(1) rotate(0deg); opacity: 1; }
}